Effects of calcium on the phase transition and the dielectric properties of Sm-modified PbTiO3 ceramics

S. B. Dai, Y. D. Juang, J. S. Hwang, D. E. Chen, S. Y. Chu

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

(Pb0.85Sm0.1)(Ti0.98Mn0.02)O 3 ceramics exhibits exceptionally large electromechnical anisotropy. Their properties allow them to be used for high-frequency applications such as SAW devices and piezoelectric transformers. Our previous studies on (Pb0.88-xCaxSm0.02)(Ti0.98Mn0.0 2)O3(x = 0.11-0.17) ceramics demonstrated that the Ca and Sm additives not only reduce the lattice anisotropy, but also maintain good dielectric and anisotropic properties of Sm and Ca-modified PbTiO3 ceramics. This study investigates the effect of calcium on the phase transition and dielectric properties of this system. X-ray diffraction, Raman scattering and DSC methods are used to elucidate the doping effect of (Pb0.88-xCaxSm0.02)(Ti0.98Mn0.0 2)O3. The X-ray results show that the c/a ratio decreases as the amount of Ca dopant increases. The DSC result indicates that the transition temperature of the F-P transition of Ca-doped PbTiO3 decreases as the content x increases.

Original languageEnglish
Pages (from-to)298-302
Number of pages5
JournalJournal of Crystal Growth
Volume255
Issue number3-4
DOIs
Publication statusPublished - 2003 Aug 1

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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